Drilling-machine



(No Model.) 7 3 Sheets-Sheet 1.

F. PANNING. DRILLING MACHINE.

No. 590,721. Patented Sept. 28,1897.

. n 4 "i m wi/lmaooeo m: 'uonms men: :93 Puo'raumo wasnmsron D c 3Sheets-Sheet 2.

(No Model.)

F FANNING DRILLING MACHINE.

I Patented Sept. 28,1897.

m: a ms Ptrgns m, Motown-1 w No Model.)

3 Sheets-Sheet 3.

F. FANNING. DRILLING MACHINE.

No. 590,721.. Patented Sept. 28,1897.

1 7?)///////////Ill/z/lIl/IIW ms PETins co. P 0 msumamn 0 c N D STATESPATE T OFFICE.

FRANKLIN FANNING, OF ST. JOSEPH, MISSOURI.

DRILLING-MACHINE.

SPECIFICATION forming part of Lette'rs Patent Nod 590,721, datedSeptember 28, 1897. Application filed February 18, 1897. Serial No.624,036. (No model.)

T0 at whom it may concern:

Be it known that I, FRANKLIN FANNING, a citizen of the United States,residing'at St. Joseph, in the'coun'ty of Buchanan and State ofMissouri, have invented certain new and useful Improvements inDrilling-Machines; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, which form a part of this specification.

My invention relates to portable drillingmachines for operating uponstationary objects, such as the rails of a railroad-track. Its objectsare to provide for a continuous automatic feed instead of theintermittent ratchet feed heretofore used, to provide for quicklyrunning the drill forward to its work and back away therefrom by meansof the driving-gear, to provide for relieving the pressure upon thecutting edge of the drill without turning it backward in case it sticksin the hole or takes too rank a cut, and to provide for adjusting thebearing-points of the clamping-hooks so that they will always be in linewith the drill.

In the drawings, Figure 1 is a side elevation of a track-drill embodyingmy improve ments. Fig. 2 is an end elevation. Figs. and 4 are top planviews on lines 3 3 4 4, respectively. Figs. 5, 6, and 7 are vertical sections of the gearing, drill-shaft, and feedsorew in differentadjustments;

The frame consists of two" standards A of inverted-T shape, therear-horizontal arm a of the T being longer than the other. Thesestandards are parallel and are connected by cross-bars A a, which formbearings for the upright driving-shaft and the drill-shaft. Near therear end of the frame are secured two upright short standards AZhavin gflanged feet o by which they may be secured to a cross-bar A Securedbetween the tops of the standards is ahandle A by which to carry andsteady the machine.

A driving-shaft B is journaled transversely in the upper part of thestandards and car ries one or more operating-cranks b. Abevelgear 0 issecured on the shaft between the standards and meshes with a similargear D on an upright'shaft E, journaled in the crossbars A. -Agear-wheel F is secured to the lower end of the shaft E and has an upperportion f, constituting a plain spur-gear, and a lower portion f",constituting a bevel-gear. These may be integral, as shown, or otherwiseformed. The bevel-gear f meshes with the bevel-gear G,whioh has a hub g,horizontally mounted in the front cross-bar a and rotatable therein,being held in place by the bevel-gear f. The gear G is splined to thedrill-shaft H, having a key g, which engages a keyway h in the shaft. I

If preferred, the shaft may have a spline and the gear a groove fittingthereon. This enables the shaft H to slide longitudinally through thegear but compels it to rotate with the gear. The rear end of thedrill-shaft is screwthreaded at H and meshes with a nut I, which has acylindrical exterior, so as to rotate freely in a bearing in one of thecross-bars a. A bevel-gear K is keyed to said nut, and meshing with saidgear is a bevel-gear Z, securedto an upright short shaft M, whichrotates in a bearing in a boss 01 on the frame N. The upper end of theshaft M has a thumb-piece m secured to it above the boss at, whichsupports the shaft and enables it to be turned by hand when desired.

- Integral with or attached to the bevel-gear Z is a spur-gear Z,normally meshing with the spur-'gear'f', the two gears Z Z forming acomposite gear L like the gear F.

I It will be seen that when the upright shaft E isrotated it not onlyimparts motion to the drill-shaft through the bevel-gears f G, butit'also rotates the nut I in the same direction through the spur-gears fland the bevel-gears Z K. In order to produce a relative rotation of thenut and the feed-screw, it is necessary to retard the nut. This is mostconveniently done by giving the spur-gear Z a greater number of teeththan the spur-gear f. The ratio is determined by the material to beoperated upon and the pitch of the feed-screw H. It can be soproportioned that the drill will gain one turn on the nut in fromtwenty-five to forty revolutions, as may be desired. In drilling steelrails for three-quarter-inoh bolts I find a desirable feed to be threehundred and six turns of the drill-shaft to one inch of feed. This willbe produced by a feed-screw having nine threads to the inch, with gearsf Z having thirty-four and thirty five teeth respectively. It will beseen that the arrangement is similar to the back gear on a lathe.

The frame N, carrying the composite gear L, is hinged at its rear end tothe frame of the machine, preferably to the upper ends of the shortstandards A The front endof the frame N is connected by links 0 with aU- shaped lever P, hinged at its upper ends, preferably to ears aprojecting from the standards A.

The lower cross-bar A between the standards A has a rearwardly-extendingarm a, in the back end of which are cut one or more teeth a The arm isso located that when the frame N is lifted, the teeth of the spurgearZafter disengagement from the spur-gear f will be brought intoengagement with the teeth a, whereby the gear Z will be locked andprevented from turning. Since the hingepivots n of the frame N are inline with the pitch-lines of the bevel-gears Z and K and their teeth aredeep enough to remain always in mesh, the locking of the spur-gear Zalso looks the nut I stationary. This position of the parts is shown inFig. 5. It enables the drill-shaft to run forward or backward rapidly byturning the cranks b, as will be readily understood.

In case a twist-drill takes too deep a cut and sticks in the hole it isvery desirable to be able to slack off the feed without turning thedrill backward, because under such circumstances a backward motion willnearly always break off the cutting edge of a twistdrill. To effect thisslacking of the feed, the frame N is lifted only far enough to disengagethe spur-gears f Z, as shown in Fig. 6. The gear L can now be turned byhand by means of the thumb-piece m, thereby rotating the nut I forwardand consequently drawin g back the drill-shaft very slightly withoutturning it. The pressure having been relieved, the gear Z can be droppedinto mesh again, as shown in Fig. 7. This provision for relieving thefeed I regard as of great importance, because track-laborers are notusually skilled in the art of grinding twistdrills, and without somesuch pressure-relievin g device many drills are liable to be broken.

The machine is held up to the rail preferably by means of theclamping-hooks R, which have blunt ends 9' to rest against the fartherside of the rail, and are provided at a point above the rail withupright adjustingscrews R, passing, preferably, through lugs r on thehooks. By means of the screws the hooks can be adjusted with referenceto the height of the rail so that they will always hear directly in theplane of the axis of the drill. Once set for the particular height ofrail being operated on they need not be changed, and the bearing-pointfor the hooks is thus always at the right place.

The rear ends of the hooks are pivoted to back levers S at a point .9 inthe rear of where the front ends of said back levers are pivoted at s tothe arms a of the standards A. The rear ends of the back levers S arepreferably united. Indeed, they may be formed of a piece of fiat metalbent to a U shape, as shown. When the back levers are raised, as shownin dotted lines. in Fig. 1 and in full lines in Fig. 2, the hooks arethrown forward and the machine can be easily set in position ordisengaged from the rail, as desired. On dropping the back levers thehooks are pressed againstthe rail and the pivots s s are brought in linewith them, so that the thrust of the drill is effectively resisted.Projecting lugs a on the rear cross-bar form stops to prevent the backlevers from dropping too far. The rear end of the feed-nut has athrust-bearing to sustain the longitudinal pressure of the drill-shaft.To this end the nut is preferably tubular, having a sleeve 1' extendingrearwardly and serving as a housing for the screw II. In the rear end ofthe sleeve is a steel plug T, having a central pivot-stud t, passingthrough the rear cross-bar a and abutting against a steel tail-block U,secured to the cross-bar by bolts V to take up any'wear. Thisconstruction reduces the friction at this point to a minimum.

The operation of my improved drilling-machine is as follows: The gear Lis first thrown out of gear by raising the short U-shaped lever P, thusinterlocking the gear and holding the nut I stationary. drill are thenrun back by the cranks and the machine placed in position with the hooksand back levers raised. The hooks are then dropped over the rail and theback levers are lowered. The drill-shaft and drill are then drivenforward by the cranks until the point of the drill comes in contact withthe rail at the proper place for the hole. The short U- shaped lever Pis then lowered, bringing the spur-gears into mesh and holding them soby reason of the pivots of the lever and the links 0 coming into line,as shownin Fig. 1. p This effectively resists the tendency of the bevelgear Z to lift and separate from the bevelgear K when in operation. Themachine is now ready for work.

To remove the machine from the rail when the job is finished or topermit a train to pass, raise the back levers and thereby release thehooks, lift the hooks, and the machine is'free.

While my invention is especially designed as a track-drilling machine,yet it is evidently applicable to a variety of uses, and I do not limitit to that class of work.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-- 1. In a drilling-machine, alongitudinallymovable drill-shaft and feed-screw, a nut meshing withsaid screw and rotatably mounted, a bevel-gear secured to the nut, adrivingshaft geared to the drill-shaft, and interme The drill-shaft anddiate back gearing between said shaft and the bevel-gear on the nut,substantially as described.

2. In a drilling-machine, a longitudinallymovable drill-shaft andfeed-screw, a gear splined to said shaft, a rotatable nut mesh-' ingwith the feed-screw and provided with a gear, two shafts gearedrespectively to said gears, intermeshing spur-gears connecting said twoshafts, and having a different number of teeth, and means fordisengaging said spur-gears without disconnecting the shafts from thegears on the drill-shaft and nut, substantially as described.

3. In a drilling-machine, a longitudinallymovable drill-shaft andfeed-screw, a gear splined to said shaft, a rotatable nut meshin g withsaid screw and provided with a gear, two shafts geared respectively tosaid gears, intermediate gearing connecting said shafts, means fordisengaging said intermediate gearing, and means for locking the nutwhen said gearing is disengaged, substantially as described.

4:. In a drilling-machine a longitudinallymovable drill-shaft andfeed-screw, a gear splined on said shaft, a rotatable nut meshing withsaid screw, and provided with a gear, two normally parallel shaftsgeared respectively to said gears, intermeshing spur-gears on saidshafts, means for disengaging said spur-gears, and a stationary arm toengage with and lock one of said spur-gears when disengaged,substantially as described.

5. In a drilling-machine, a drill-shaft, feedscrew and rotatablefeed-nut, a driving-shaft geared to the drill-shaft, a hinged frame, ashort shaft journaled in said frame and geared to the nut, spur-gearsconnecting said driving-shaft and short shaft, and a stationary armhaving one or more teeth to engage with the spur-gear on the short shaftwhen the hinged frame is tilted, substantially as described.

6. In a drilling-machine, a drill-sh aft, feedscrew and rotatablefeed-nut, a driving-shaft geared to the drill-shaft, a hinged frame, alever for lifting said frame, links connecting the lever with the frame,a short shaft journaled in said frame and geared to the feednut, andintermeshingseparable spur-gears on the driving-shaft and short shaft,substantially as described.

7. In a drilling-machine, the combination with the drill-shaft, thefeed-screw and the rotatable feed-nut, of a driving-shaft geared to thedrill-shaft, a short shaft geared to the nut, separable intermeshingspur-gears on the driving-shaft and short shaft, said gears having adifferent number of teeth, a frame hinged on a line intersecting thepitch-lines of the gear on the nut and the gear on the short shaft, andcarrying said short shaft, a thu nib-piece on the short shaft, an armcarrying teeth, and a lever connected with the hinged frame to lift thesame, substantially as described.

8. In a drilling-machine, the combination with a frame havingcross-bars, of a rotatable feed-nut having a tubular extension, apivotstud at the end of said extension having a bearing in andprojecting through one of said cross-bars, a thrust-bearing block forsaid stud, and adjusting-screws connecting said block with saidcross-bar, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.I

FRANKLIN FANNING. Witnesses:

JOHN I. MCDONALD,

J AS. 13. SHIRLEY.

